86516831 has 8 divisors (see below), whose sum is σ = 89878800. Its totient is φ = 83180160.

The previous prime is 86516819. The next prime is 86516863. The reversal of 86516831 is 13861568.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86516831 - 2¹⁸ = 86254687 is a prime.

It is a super-2 number, since 2×86516831² = 14970324092565122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86512831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 800 + ... + 13178.

It is an arithmetic number, because the mean of its divisors is an integer number (11234850).

Almost surely, 2^86516831 is an apocalyptic number.

86516831 is a deficient number, since it is larger than the sum of its proper divisors (3361969).

86516831 is a wasteful number, since it uses less digits than its factorization.

86516831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12649.

The product of its digits is 34560, while the sum is 38.

The square root of 86516831 is about 9301.4424150236. The cubic root of 86516831 is about 442.2829535537.

The spelling of 86516831 in words is "eighty-six million, five hundred sixteen thousand, eight hundred thirty-one".